Soap. Made From Restaurant Grease?

It all started when Marshall Dostal began using biodiesel in his car. He'd collect waste grease from restaurants and distill it. What he was left with was glycerin...the key ingredient in soap.

So he started making handwash, which he then sold back to the restaurants. Now, the soap, called, Further, is available online. It's biodegradable and not tested on animals, plus it's scented with essential oils of bergamot and olive.